3 years ago

What is the system of solution to y-x=-13 and -4x+3y=-51

1 answer:

8 0

Equation 1 ==> y - x = -13
Equation 2 ==> -4x + 3y = -51
3(y - x) = 3(-13)
Equation 3 ==> 3y - 3x = -39

Equation 2 - 3
= (3y - 3y) + ( -4x - (-3x) ) = -51 - (-39)
-x = -12
x = 12

Substitude x into equation 1
y - 12 = -13
y = -1

You might be interested in

Right triangle ABC is located at A (−1, 4), B (−1, 1), and C (−5, 1) on a coordinate plane. What is the equation of a circle A w

alexandr1967 [171]

The circle is in A, so (-1, 4) coords

(x - xo)² + (y - yo)² = r²

(x - (-1))² + (y - 4)² = r²

(x + 1)² + (y - 4)² = r²

And the radius is the length of segment AC

distance of AC is

$\sqrt{(yc-ya)^2+(xc-xa)^2}$

$\sqrt{(1-4)^2+(-5-(-1))^2}$

$\sqrt{(-3)^2+(-4)^2}$

$\sqrt{9+16}$

$\sqrt{25}$

$5$

So r = 5

(x + 1)² + (y - 4)² = 5²

(x + 1)² + (y - 4)² = 25

6 0

3 years ago

The answer choices are 39, 51, 70.5, 78 please help! i’ll give brainliest

zzz [600]

Answer: 51 degrees

Step-by-step explanation:

8 0

3 years ago

A zoo has 65 birds now. It adopted 17 new birds last week. How many birds did the zoo have before it adopted the new birds? Writ

svetoff [14.1K]

Correct me if I’m wrong but I believe the answer is 48

6 0

2 years ago

Which choice is equivalent to the quotient shown here when X>0? Square Root 18x divided by square root 32

Marina86 [1]

Answer:

The answer is A

Step-by-step explanation:

3 0

3 years ago

How many milligrams is equal to 85 grams?

myrzilka [38]

85,000 milligrams is equal to 85 grams! :)

5 0

3 years ago

Read 2 more answers